I looked at that power supply and kind of wondered if it were homemade?  One could have taken a blank plate and made their own.  I say that without having seen real older versions of Teletype or military power supplies, but none I've ever seen look like that one. Teletype versions mount the transformers differently.  However it does look to be well made.

On 7/14/2025 5:31 PM, Duncan Brown wrote:

John,

That looks like the right schematic!

Nick had identified it as an early Navy unit, TT-47 (actually a TT-69, since it is a table model) and sent me to the manual, NAVSHIPS 91713, which shows the LESU wiring color codes (fig 3-3) that matches this unit.

Nick - you questioned the DC supply ("rectifier") in this LESU.  In NAVSHIPS 91713, p 1-12, there is a note about an optional rectifier an it shows up in fig 3-1.

The military nomenclature plate had been removed, or I would have known where to look for documentation.  I can see a spot on the cabinet under the keyboard, where a label has been removed. there is also a red inspection? stamp that looks military?   See pic.

Thanks!!!

Duncan
K2OEQ